Having the same issue, the crackling continues no matter what ASIO buffer size is used. Also the performance indicator shows there is no overloading of the PC. There are no problems in others DAWs or using standalone versions of the virtual instruments. Since this is something that has only recently become an issue, it can only really be a Cakewalk issue, potentially one that has been introduced recently to the code instead of something that has changed in the OS that affects just the Cakewalk DAW.
Hopefully it will get resolved quickly before it becomes an issue that turns people away, especially with the new features.